Acetylene-lamp.



L. M. EVANS.

AOETYLENE LAMP.

APPLIOATION FILED SEPT. 11, 1912.

1,081,899, Patented Dec. 16, 1913.

2 BHEETB-SHEETL i Q Fa whine mes L. M. EVANS.

AOETYLENE LAMP.

APPLICATION FILED SEPT. 11, 1912.

Patented Dec. 16, 1913.

2 SHEETS-88BX21 2.

M Snvemor Lieu/Elly]? M45041! witnesses attorneys F l STATS ATENT OFFICE.

LLEWELLYN M. EVANS, OF SCRANTON, PENNSYLVANIA, ASSIGNOR TO THE SCRANTON ACETYLENE LAMP 00., OF SCRANTON, PENNSYLVANIA, A CORPORATION OF PENN SYLVANIA.

Losrsae.

T 0 all whom it may concern Be it known that I, LLEWELLYN M. Evans, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Acetylene-Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others. skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in acetylene lamps having reflectors and an object of the invention is to provide improved means for holding the reflector to the body of the lamp.

,A further object is to provide improved means for producing an air tight joint between the water and carbid chambers.

With these and other objects in view the invention comprises certain novel constructions combinations and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings: Figure 1 shows a side elevation of the lamp embodying the invention. Fig. 2 shows a vertical central section through the lamp, part of the reflector and its retaining means beingshown in elevation. Fig. 3 is a top plan view ofthe lamp. Fig. 4 is a diagrammatic view showing the form of spring secured to the lamp body. Fig. 5 is a detail perspective view of the reflector complete. Fig. 6 is a to plan view of the carbid chamber. Fig. 1s a sectional view showing a modified form of reflector. 8 is a vertical sectional view of a modified form of the invention.

Like characters of reference designate corresponding parts throughout the several views.

Lamps heretofore in use having reflectors have had certain defects arising from the manner of securing the reflector to the lamp body. The common method employed for fastening the reflector has been to solder the same to the body of the lamp, but with such small reflectors and with the intense illuminating flame so close to all parts of the refleetor'it is not an infrequent thing to have the solder melted by the heat of the Specification of Letters Patent.

Application filed September 11, 1912.

Patented Dec. 16, 1913. Serial No. 719,852.

tieally disables the lamp until conditions are such as to safely permit the resoldering of the reflector to the lamp. lVith my improved reflector, which is detachable from the lamp, these disadvantages are not only overcome, but other advantages are 6btained.

Referring to the drawings, particularly Fi 9 it will be seen that the lamp comprises a water chamber 1, a carbid and gas chamber 2, with the other necessary attachments common 'to the present forms of acetylene lamps. The water chamber 1 has formed in its lower surface a pocket from which leads an outlet pipe 3 designed to carry the gas from chamber 2 to any suitable gas jet 4. The reflector 5 has a brace 6, preferably made of wire, which is dc signed to slip over a spring hook 7, shown in Fig. 4, suitably secured to the water chamber 1 of the lamp. Each end of the wire brace 6 is formed with an eye .8 which is designed to fit closely around the rim 9 of the reflector 5 to form pivots about which the brace 6 swings when it is desired to engage the same with the spring hook 7. Suitably secured to the reflector 5 to one side of the center of said reflector is a short tube 10 which is designed to fit closely around the outlet pipe 3 and thus afford a means of supporting the reflector 5 upon the outlet pipe. When it is desired to secure .the reflector to the lamp the tubing 10 is slipped over the outlet pipe 3 and the brace 6 forced down over spring 7.

From the description already presented it will be seen that the reflector which may be spherical or parabolic is supported by means of the pipe which furnishes the gas. In the case of a parabolic reflector, the outlet pipe 3 with its jet 4 is so placed that the hottest part of the flame, and consequently.

the part of greatest luminosity, will be at the focus, whereas if a spherical reflector' be used. this lntense part of the flame 1s- I the center of the reflector, is to leave unbroken that part of the reflector capable. of sending parallel rays. Another reason for supporting the reflector from the point to one side of its center is that the reflector may send rays in adownward direction with respect to the lamp so that when the handle is slipped over one edge of a projecting board or ledge to hold the lamp vertical the reflected rays will be thrown upon the ground. A handle which accomplishes this is shown in the drawings where two pivoted wire loops 20 and 21 swing about a wire hook 22 designed to slip over the ledge, the wire loops in their extended position forming a plane surface to engage the projecting side of the ledge.

As shown in Fig. 7, a slightly modified form of reflector is shown, the tube 10 of the reflector 5 being replaced by an opening it designed to fit closely about the projecting pipe 3. In this form of reflector, the back of the reflector is designed to be tangent to the water chamber lat a point 12. which point of tangency acts in the capacity of a fulcrum. the reflector acting as a lever one end of which is held to the spring 7 by the brace 6 while the other end is held to pipe 3 by the opening 11. The top of the carbid chamber 2 is formed with. a shoulder having a groove 13 into which fits a suitable rubber washer 14;. By reason of the groove 13 the wash er 14: will be almost completely coveredljiy the rounded projection 15 formed upon the water chamber 1 as the latter is screwed tightly upon the chamber 2. This construction provides an improved airtight joint which admits of practically no escape of from the gas chamber.

From the construction shown it will be apparent that the removable reflector is so held by the outlet pipe from the gas chamber as to direct the reflected rays in a downward direction. It will also be apparent that no solder is used and that any accident which might destroy the reflector will not disable the lamp for it will be possible to immediately replace a new reflector without the introduction of any process requiring heat'which might ignite the inflammable gases.

As shown in Fig. 8, the valve stem is completely housed, said housing being formed by a tube 16 that is secured in the upper end of the water chamber, the lower end of said housing being formed by a tube 17 adapted to be secured in the lower end of the tube 16, it being understood that the lower end of tube 16 is far enough above the bottom of the water chamber to allow water to pass throu h the openings 18 in the walls of the tube 1?. The object of makin this housing as shown is to form a rein orcement to the inverted valve stem, it being known by this construction that it is more dilhcult to bend or break the water tube. No tendency is found by this construction to break or bend the joint between the tube 16 and the water chamber when the valve is secured into place, nor is any undue strain. brought to appear upon the fastening between the pipe 17 and the bottom of the water chamber, these advantages being obtained by thereason of the fact that the strain is all thrown upon the threaded joint between the tubes 16 and 17.

I claim 1. The combination with a lamp body having a substantially radially extending tube, of a reflector having an opening proportio'ned to embrace the tube, a bail mounted upon the reflector and a resilient latch member carried upon the body positioned to engage the bail.

2. The combination with a lamp body having a gas discharge tube protruding from one side, of a concave reflector having an opening removed from its axis proportioned to embrace the tube, an engaging member carried by the lamp body, and a connecting member carried by the reflector proportioned to interengage with the engaging member.

3. The combination with a lamp body having a gas discharge tube protruding from one side of a reflector having an opening, a tube rigidly secured communicating with the opening, said tube and opening being proportioned to embrace the gas discharge tube and located adjacent the lower edge of the reflector and means connected adjacent the upper edge of the reflector adapted to secure the reflector to the lamp body.

4:. The combination with a lamp body having an engaging member extending outwardly therefrom, a gas discharge tube protruding from the lamp body below and in axial alinement withthe engaging member, a reflector having an opening proportioned to embrace the gas discharge tube, such opening being located adjacent its lower edge, and a bail pivoted to the reflector adjacent its upper edge adapted to engage over the engaging member.

5. The combination with a lamp body having a tube extending from the side thereof, of a concave reflector having an opening proportioned to embrace the tube and adjacent the lower edge thereof, and resilient said reflector and lamp body, said means connection between the top of the reflector being spaced from said opening. 10 and said lamp body. In testimony whercot'l aflix my signature 6. The combination with a lamp body in presence of two witnesses. having a tube extending from the side there LLEWELLYN M. EVANS. of, of a concave reflector having an opening Witnesses: proportioned to embrace the tube and yield- L. D. S'rown, ing connecting means between the top of H. F. MGPEEK.

$091120 0! m patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

7 Washington, D. G. 

